[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray](https://indike.org/pramana/ins.science.ray-1956) › c30.s2.4 # History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c30.s2.4 History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c30.s2.4 - **Language:** English ### [c30.s2.4](https://indike.org/pramana/ins.science.ray-1956.c30.s2.4) Molten tin is dropped into the juice of \*Vitex negundo\* mixed with turmeric, the process being repeated three times the metal undergoes purification. 156 - [Previous: c30.s2.3](https://indike.org/pramana/ins.science.ray-1956.c30.s2.3) - [Next: c30.s2.5](https://indike.org/pramana/ins.science.ray-1956.c30.s2.5) - [Up: c30.s2](https://indike.org/pramana/ins.science.ray-1956.c30.s2) --- Source: [https://indike.org/pramana/ins.science.ray-1956.c30.s2.4](https://indike.org/pramana/ins.science.ray-1956.c30.s2.4) · Pramāṇa